The phrase "heart worm" refers to a type of parasite that infects the heart and lungs of animals, particularly dogs. It can cause serious health problems and if left untreated, it can be fatal. Full definition
We will call your vet to see if the dog you had, or have is: up to date on shots, spayed or neutered, and on heart worm preventative medication. (pawsplace.org)
Is the treatment for heart worm disease too risky at her age? (1800petmeds.com)
In order for your pet to receive heartworm prevention, they must have a negative heart worm test within the past year. (roxboroanimalhospital.com)